Here's what rhymes with diachronistic.
mystic cystic logistic artistic realistic optimistic anachronistic autistic ballistic sadistic theistic animistic communistic monistic euphemistic sophistic linguistic unrealistic heuristic holistic humanistic mechanistic pessimistic statistic dualistic moralistic atheistic egoistic hedonistic juristic legalistic patristic chauvinistic egotistic eulogistic shamanistic surrealistic voyeuristic aphoristic casuistic puristic characteristic antagonistic stylistic deterministic idealistic journalistic naturalistic simplistic altruistic opportunistic pluralistic rationalistic ritualistic socialistic synergistic fatalistic futuristic novelistic pantheistic polycystic syllogistic feudalistic inartistic jingoistic pugilistic belletristic nepotistic monopolistic nationalistic capitalistic narcissistic paternalistic relativistic impressionistic militaristic monotheistic positivistic cannibalistic polytheistic expressionistic overoptimistic materialistic probabilistic imperialistic oligopolistic uncharacteristic universalistic individualistic sociolinguistic spiritualistic Words that almost rhyme with diachronistic
flyspeck granitic mimic mythic lipstick lytic dipstick diptych nitpick critic civic lyric acidic picnic citric cryptic elliptic physic rabbinic cynic lithic thymic gimmick triptych sylphic analytic clinic rhythmic terrific catalytic parasitic acrylic ecliptic idyllic limbic pacific paralytic satiric arthritic empiric honorific patronymic arrhythmic nephritic periwig pinprick bromidic zoophytic specific scientific intrinsic apocalyptic hemolytic prolific dendritic horrific syphilitic haemolytic hydrolytic impolitic neolithic organismic porphyritic bulimic pantomimic philippic cenobitic juridic coenobitic nonrhythmic extrinsic logarithmic monolithic electrolytic hydrophilic phenotypic proteolytic algorithmic antiarrhythmic basophilic metaphysic thrombolytic antisemitic megalithic saprophytic unspecific hermaphroditic psychoanalytic nonspecific hemispheric unscientific carboxylic cataclysmic fibrinolytic hieroglyphic nonscientific palaeolithic paleolithic encephalitic transpacific polyclinic eosinophilic stratospheric